Mortise lock deadlocking latch and deadbolt block



06L 7, 1959 J, RUSSELL ET AL Re. 26,677

MORTISE LOCK DEADLOCKING LATCH AND DEADBOLT BLOCK Original Filed April23. 1965 3 Sheets-Sheet 1 F250 -72 RUSSELL R0652 -12 NOL/H mvswrozs d/IJATTORNEYS Oct. 7, 1969 F. J. RUSSELL ET AL MOR'I'ISE LOCK DEADLOCKINGLATCH AND DEADBOLI' BLOCK Original Filed April 23, 1965 3 Sheets-Sheet 2'7 F250 .1. RUSSELL 120652 J. Now/4 1 z Ohm/vy- ATTOQMEVS 0a. 7, 1969 F,,3, RUSSELL ETAL Re. 26,677

MORTISE LOCK DEADLOGKING LATCH AND DEADBOLT BLOCK Original Filed April23, 1965 3 Sheets-Sheet 3 FRED J2 RUSSELL 2065 J: NOL/H mulehrrozsATTbRNEYS United States Patent 26,677 MORTISE LOCK DEADLOCKING LATCH ANDDEADBOLT BLOCK Fred J. Russell, Beverly Hills, Calif. (8635 Otis St.,South Gate, Calif. 90281), and Roger J. Nolin, Monterey Park, Calif.;said Nolin assignor to said Russell Original No. 3,337,251, dated Aug.22, 1967, Ser. No. 450,472, Apr. 23, 1965. Application for reissue Nov.24, 1967, Ser. No. 689,741

lnt. Cl. E051: 9/10; Eb 59/00, 63/14 US. Cl. 292-34 Matter enclosed inheavy brackets I: appears in the original patent but forms no part ofthis reissue specification; matter printed in italics indicates theadditions made by reissue.

4 Claims ABSTRACT OF THE DISCLOSURE The subject matter of the inventionhere under consideration consists of the employment of an auxiliary boltwhich, when depressed by engagement with 21 strike plate, blockspry-back of the latch bolt by unauthorized means. The mechanismadditionally includes elements which act in response to authorizedmeans, such as rotation of a spindle or a key-actuated mechanism, towithdraw the latch bolt despite the depressed condition of the auxiliarybolt.

Although the auxiliary bolt mechanism here under consideration may befound useful in a variety of types of door locks, it has been foundespecially advantageous for use in a mortise type lock, namely one whichfits into a recess which has been cut into the door from the free edgeof the door. When a rugged, high quality type lock is needed, mortiselocks often are selected. Typical installations for a high qualitymortise type lock are installations for hotels, hospitals, and schools.Because, in supplying these various installations, different performancecharacteristics are frequently demanded, it is advantageous to constructa mortise type lock which is versatile to the extent that certain partsof the mechanism can be readily changed to produce dilferent functionalresults, without there being need to change the balance of the lockconstruction. A structure of this kind is quite helpful in limitinginventory, while at the same time providing a lock which is readilyconvertible to fit most needs.

Because of the security demanded of locks of this kind, there isfrequent demand for having them equipped with an auxiliary bolt likethat here made reference to, an auxiliary bolt capable of blocking thelatch bolt against the prospect of being pried back when the door is inclosed condition. Although blocking expedients have been reasonably wellknown heretofore, special means for unblocking must be provided in amortise type lock which will make unblocking possible by manipulation ofany one of several of the means which may be employed for normallywithdrawing the latch bolt.

It is therefore among the objects of the invention to provide a new andimproved auxiliary bolt for blocking a possible pry-back of the latchbolt which is relatively simple in its construction and operation, bothfrom the Reissued Oct. 7, 1969 point of view of blocking and from thepoint of view of releasing the blocking adjustment from any one ofseveral different locations.

Another object of the invention is to provide a new and improvedblocking mechanism for preventing pryback for a reciprocation latch boltby unauthorized means, the parts of which can be readily incorporatedinto a somewhat versatile and relatively complex mortise type lock,without need for altering the remainder of the mortisc lock mechanism toany appreciable degree.

Still another object of the invention is to provide a new and improvedauxiliary bolt mechanism for blocking a latch bolt against pry-back byunauthorized means which is relatively simple and which further includessundry safety factors which will prevent damage to other portions of thelock mechanism which might otherwise be present except for the multiplefunctioning attributes of the auxiliary bolt.

With these and other objects in view, the invention consists in theconstruction, arrangement, and combination of the various parts of thedevice, whereby the objects contemplated are attained, as hereinafterset forth. pointed out in the appended claims, and illustrated in theaccompanying drawings.

In the drawings:

FIGURE 1 is a side elevational view of a fragment of a door, showing amortise type lock mounted therein.

FIGURE 2 is an end elevation-a1 view of the installation of FIGURE 1.

FIGURE 3 is a side clevational view, substantially broken away, showingthe relationship of operating parts of the mechanism in the positionthey would have with the door open.

FIGURE 4 is a view similar to FIGURE 3 but showing the relationship ofthe parts with the door in closed position in cooperation with a strikeplate on the door frame.

FIGURE 5 is a fragmentary longitudinal sectional view on the line 55 ofFIGURE 4.

FIGURE 6 is a fragmentary horizontal sectional view on the line 6-6 ofFIGURE 4.

FIGURE 7 is a fragmentary horizontal sectional view on the line 7-7 ofFIGURE 3.

FIGURE 8 is a fragmentary sectional view similar to FIGURE 7 but takenon the line 8-8 of FIGURE 4.

FIGURE 9 is a fragmentary cross sectional view taken on the line 9-9 ofFIGURE 3.

A lock construction especially well adapted to the invention here underconsideration is shown and described in copending applications Scr. No.450,461, filed Apr. 23, 1965, now US. Patent 3,316,003; Scr. No.450,450, filed Apr. 23, 1965, now US. Patent 3,298,729; Ser. No.450,447, filed Apr. 23, 1965; Scr. No. 450,460, filed Apr. 23, 1965;Scr. No. 450,446, filed Apr. 23, 1965; Set. No. 450,462, filed Apr. 23,1965, now US. Patent 3,316,- 006.

In an embodiment of the invention which has been selected as one forshowing a typical arrangement of structural parts involving theinvention, there is shown a mortise type lock indicated generally by thereference character 10, substantially all of which is housed within acase 11. An inside wall 12 and an outside wall 13, forming part of thecase 11, form a chamber between them, one end of which is defined by anoutside end wall 14 and the other end of which is defined by an insideend wall 14. A top wall 15 and bottom wall 15' complete the enclosure ofthe chamber.

The mortise type lock 10 is provided with a deadbolt 16 rcciprocatablymounted in a rectangular hole 17 in the outside end wall 14 and with alatch bolt 18 rcciprocatably mounted in an extension 17 of therectangular hole 17. An auxiliary bolt is reciprocatably mounted in arelatively smaller rectangular hole 19 in the outside and wall 14. Anarmored front plate 21 is adapted to overlie the outside end wall 14 andto be attached thereto by screws 25. The case 11 is mounted within arecess 22 extending inwardly from an end edge 23 of a door 24, therebeing provided screws (not shown) which attach the outside end wall 14to the end edge 23 of the door 24.

On a door frame 26, as viewed in FIGURE 4, there is provided a recess 27which accommodates a box 28, on the outer end of which is a strike plate29 secured to the door frame 26 by screws 30. In the strike plate 29 isan opening 31 adapted to receive the dead bolt 16 and a second opening32 adapted to receive the latch bolt 18. An extension 33 of the strikeplate 29 provides a surface against which the auxiliary bolt engages sothat the auxiliary bolt 20 will be depressed when the door 24 is in theclosed position of FIGURE 4.

For mounting the dead bolt 16 in its position in the case 11, there isprovided a block 35 which may, if desired, be of nonmetallic material,the block 35 being anchored in position by suitable means (not shown). Aslide away 37 extending through the block 35 reciprocatably mounts thedead bolt 16 therein, there being provided an opening 38 in the armoredfront plate 21 in alignment with the rectangular hole 17 in the outsideend wall 14.

For manipulating the dead bolt 16, there is provided a rock arm 40provided with bearing 40" pivo-tally mounted respectively in the insidewall 12 and the outside wall 13 of the case 11. A link 42 is pivotallysecured by a pivot connection 43 to an end 44 of the rock arm 40. Theother end of the link 42 is attached to the dead bolt 16 by a pivotconnection 45. On the inside wall 12 of the case 11 there is provided aturn mechanism, indicated generally by the reference character 46.Opposite the turn mechanism 46 and mounted on the outside wall 13 of thecase 11 is a keyactuated mechanism, indicated generally by the referencecharacter 47. Through an appropriate actuator 48, the dead bolt 16 canalways be operated by the turn mechanism 46 by rotating the handle 49and can be operated by the key-actuated mechanism 47 when an appropriatekey is inserted and turned therein, The actuator 48 has at its outer enda rounded driver 54 which fits in a pocket 55 in the rock arm 40 so thatwhen the driver 54 is rotated either clockwise or counterclockwise, asviewed in FIGURES 3 and 4, the rock arm 40 can be rotated To operate thedead bolt 16 by means of a key-actuated mechanism 47, there is providedthe usual key plug 56, in which is a keyway 59. At the inner end of thekey Plug 56 is an eccentrically mounted disk 60, from which extends aboss 62 which travels about a center point 61. Ends 63 and 64 of theboss 62 are adapted to move against one or another of the shoulders 65or 66 of the actuator 48 to pivot the actuator 48 in one direction oranother for its movement in the pocket 55.

The latch bolt 18 may be operated in a number of different ways, as, forexample, by manipulation of an inside knob 85, an outside knob 87, theturn mechanism 46, or the key-actuated mechanism 47. For operating thelatch bolt 18 by means of the outside knob 87, for example, there isprovided a square spindle 86 nonrotatably attached to the outside knob87, and the square spindle 86 fits in a square hole 89 in a rollback 88,For clockwise rotation of the rollback 88, an end 90 moves against ablock 92 and shifts the block 92 from left to right, as viewed, forexample, in FIGURE 3. For counterclockwise rotation, an end 91 of therollback 88 would move against the block 92 and accomplish the sameresult. A cam 93 forming part of the block 92 then moves against arollback link 74, causing it to pivot in a clockwise direction about apivot point 94. A head 75 of a latch bolt rod 76 overlies the rollbacklink 74 and is then caused to move in a direction from left to right, asviewed in FIGURE 3. Since the latch bolt rod 76 is attached to the latchbolt 18 by means of a pivotal connection 77, the latch bolt 18 isaccordingly withdrawn against tension in a coiled spring 79. At the sametime, the block 92 moves against a return spring 78. The latch bolt 18may also be moved by manipulation of the inside knob through a similarrollback 88 on a spindle 86', having ends (not shown) similar to 90, 91likewise acting against the block 92 in the same fashion. It will beunderstood that, in the mortise lock assembly here shown, the outerrollback 88 with the outside knob 87, as viewed in FIGURE 3, is blockedfrom rotation by a slide 95 in the case 11 which is in engagement withthe slot 98 in the rollback 88.

Should it be desired to manipulate the latch bolt 18 by operation of thekey-actuated mechanism 47, then rotation of an arcuate, off-center camway 80 on the tail disk 60 moving against a cam plate 81 on an actuatorlink 70 pivoted, as shown, by a pivot pin 71 causes the actuator link 70to pivot in a counterclockwise direction. A flange 72 on the actuatorlink 70 moves against a flange 73 on the rollback link 74 causing therollback link 74 to rotate in a clockwise direction, thereby to moveagainst the head 75 of the latch bolt rod 76 and withdraw the latch bolt18 attached to it. As shown, the latch bolt 18 mounted in the extension17' of the rectangular hole 17 extends outwardly through an aligned hole82 in the armored front plate 21.

The auxiliary bolt 20 which is mounted in the rectangular hole 19 in theoutside end wall 14 extends outwardly through a similar rectangular hole83 in the armored front plate 21.

On the inner end of the auxiliary bolt 20 is an auxiliary bolt lever 100which has at its inner end a forwardly and upwardly extending diagonalarm 101 terminating at its upper end 101' in a horizontal arm 102.Attention is directed to FIGURES 7 and 8 in connection with FIG- URES 3and 4 for an explanation of this portion of the mechanism. In therelationship of parts illustrated in FIGURES 3 and 7, the relativelywide extension 103 underlies a stop flange 104 on a verticallyreciprocating strip 105 and prevents the vertically reciprocating strip105 from moving downwardly. The strip 105 is guided in its movement by aguide flange 106 sliding in a vertical slot 108 in the strip 105, theguide flange 106 being part of a liner plate 107. The purpose of this isto prevent extension of the dead bolt 16 when the door 24 is open. Thisis accomplished by employment of a pin 109 extending laterally from therock arm 40 into a horizontally elongated hole 109 in the strip 105.Clearly, therefore, when the strip 105 cannot move downwardly, the rockarm 40 cannot be rotated by any means, and, therefore, the dead bolt 16cannot be extended.

In this connection, attention is called to a leaf spring 110 secured toanchoring elements 111 and 112 of the block 35 in a position such that afree end 113 of the leaf spring 110 engages one side or the other of aprojection 114 on the rock arm 40 to releasably hold it either in thewithdrawn position of FIGURE 3 or the extended position of FIGURE 4.

When the door 24 is in closed position as shown in FIGURE 4, the deadbolt 16 can be extended. This is permitted because the auxiliary bolt 20is then depressed by engagement with the extension 33 of the strikeplate 29, and the extension 103 of the horizontal arm 102, attached tothe auxiliary bolt 20, is shifted from the position of FIGURE 7 towardthe right to the position of FIGURE 8. This movement removes theextension 103 from beneath the stop flange 104, and this permits thestrip 105 to slide freely downwardly. Accordingly, there is noimpediment to rotation of the rock arm 40, and the rock arm 40 can thenbe rotated, either by the turn mechanism 46 or the key-actuatedmechanism 47 to move the dead bolt 16 into the locked or unlockedposition.

The auxiliary bolt 20, of course, performs a double function in that,when it is depressed in closed position of the door 24 illustrated inFIGURE 4, pry-back of the latch bolt 18 is blocked. Therefore, even ifthe dead bolt 16 is not extended into a locked position, the latch bolt18 cannot be pried back to open the door 24 by unauthorized means whenthe outside knob 87 is made rigid by the engagement of slide 95 in slot98, as shown in FIG- URE 3.

This blocking by the auxiliary bolt 20 is accomplished by employment ofa bell crank [17 pivotally secured to the case 11 by a pivot pin 119.When the auxiliary bolt 20 slides in an appropriate slideway 120inwardly against a compression spring 121, the compression spring 121presses against the bell crank 117: At the same time, the upper end 101is moved away from the rear end of the bell crank 117, and the bellcrank 117 pivots in a clockwise direction about the pivot pin 119 untila blocker 122 forming part of the bell crank 117 rises from the positionof FIGURE 3 to the position of FIGURE 4, where it is stopped byengagementwith a stop 122' which is fixedly attached to the inside wall12. When the blocker 122 is in this position, the latch bolt 18 can bemoved only a short distance until an inner end 127 engages the blocker122, after which the latch bolt 18 cannot be moved any further. Shouldthe auxiliary bolt 20 be released, the upper end 101' would be movedtoward the left against the diagonal arm 101, Since the force of thecompression spring 121 at the upper end of the diagonal arm 101 is muchgreater than the force of the outer end of a coil of the spring againstthe opposite side of the diagonal arm 101, the diagonal arm 101, andaccordingly the bell crank 117, would be pivoted sharply in acounterclockwise direction and withdraw the blocker 122 to the unblockedposition of FIGURE 3.

A bracket 118 is also pivotally mounted upon the pivot pin 119 and isprevented from rotating clockwise about the pivot pin 119 when pressedupon by the blocker 122, because a flange 124 on an arm 125 of theblocker limiting bracket is prevented from moving rotationallydownwardly because it engages a lifting shoulder 126 on the rollbacklink 74 which, at this moment, is stationary, as illustrated in FIGURE3.

In order to withdraw the latch bolt 18 and open the door 24, while theauxiliary bolt 20 remain depressed, it is necessary to remove theblocker 122 from its position behind the latch bolt 18. This isaccomplished by rotation of the rollback link 74 in a clockwisedirection about the pivot point 94, as view in FIGURE 3. When therollback link 74 is rotated as heretofore described, the liftingshoulder 126 moves in a generally upward direction against the flange124 and causes the bracket 118 to rotate slightly in a counterclockwisedirection, as viewed in FIGURE 3, about the pivot pin 119. The movementis suflicient to move an end 123 of the bracket 118 against the rear ofthe blocker 122, thereby to rotate the bell crank 117 in acounterclockwise direction, as viewed in FIGURES 3 and 4, about thepivot pin 119 far enough so that the blocker 122 moves out of alignmentwith the latch bolt 18. By reason of there being a clearance between theinner end 127 and the blocker 122, the blocker 122 can clear before thelatch bolt 18 is withdrawn in the usual fashion.

Of course, the rollback link 74 can be moved in the manner described byoperation of the outside knob 87, when unlocked, or by the inside knob85. It also can be manipulated by operation of the actuator link 70 whenmoved by operation of the key-actuated mechanism 47, as also previouslydescribed. Therefore, although the latch bolt 18 can be securely blockedagainst pry-back, it can be freely manipulated when it is to bewithdrawn by authorized means through the agency of the mechanismsheretofore described. Further, it will be apparent from the foregoingdescription that the auxiliary bolt 20 performs a double function,namely that of preventing pry-back of the latch bolt 18 when the door 24is closed and that of preventing inadvertent extension of the dead bolt16 when the door 24 is open.

While the invention has herein been shown and de scribed in what isconceived to be the most practical and preferred embodiment, it isrecognized that departures may be made therefrom within the scope of theinvention, which is not to be limited to the details disclosed herein,but is to be accorded the full scope of the claims so as to embrace anyand all equivalent devices.

We claim:

1. In a lock including a case, a latch bolt assembly reciprocatablymounted in said case, a rollback mechanism including a spindle rotatablymounted in said case, a rollback link in operable engagement with saidspindle, said latch bolt assembly being in operative engagement withsaidrollback mechanism, an auxiliary bolt member reciprocatably mounted insaid case for blocking said latch bolt assembly against pry-back whenthe auxiliary bol't member is in depressed position, a blocker memberhaving a pivotal mounting in said case for movement between a blockingposition behind said latch bolt assembly and an unblocking positionremoved from said latch bolt assembly, a yieldable connection betweensaid auxiliary bolt member and said blocker member adapted to pivot saidblocker member into blocking position behind said latch bolt assemblywhen said auxiliary bolt member is in depressed condition, a bracketmovably mounted in said case, said bracket having a position ofengagement with said blocker member on one vertical side of said pivotalmounting when said blocker member is in blocking position, said rollbacklink having a pivotal mounting in said case on the other vertical sideof said pivotal mounting, and means for moving said blocker member fromblocking position, said means including a lifting shoulder on saidrollback link and a lifted shoulder on said bracket in overlyingengagement with said lifting shoulder, whereby said blocker member isrotated out of the position which blocks retraction of said latch boltby operation of said rollback mechanism while said auxiliary bolt memberis depressed.

2. In a lock including a case, a dead bolt assembly reciprocatablymounted in said case, a latch bolt assembly reciprocatably mounted insaid case, and an auxiliary bolt member reciprocatably mounted in saidcase, said dead bolt assembly including a rocker mechanism pivotallymounted in said case, a rollback mechanism rotatably mounted in saidcase in operative engagement with said latch bolt assembly, a blockermember pivotally mounted in said case and a connection between saidauxiliary bolt member and said blocker member adapted to pivot saidblocker member to a blocking position behind said latch bolt assemblywhen said auxiliary bolt member is in depressed position whereby toprevent pry-back of said latch bolt, means mounted on said case inengagement with said blocker when said blocker is in blocking position,a moving engagement between said blocker and said rollback mechanismadapted to move said blocker member out of position blocking retractionof said latch bolt assembly, said auxiliary bolt member including meansblocking extension of said dead bolt assembly to extending position whensaid auxiliary bolt member is in extended position including a slidereciprocatably mounted in said case for movement in a directiontransverse relative to said auxiliary bolt member and a movableconnection between said dead bolt assembly and said slide, saidauxiliary bolt member having a blocking position relative to said slidewhen said auxiliary bolt member is in extended position whereby to blockextension of said dead bolt assembly to extending position and a clearposition relative to said slide when said auxiliary bolt member is inretracted position whereby to enable extending of said dead boltassembly.

3. In a lock including a case, a dead bolt assembly reciprocatablymounted in said case, [a latch bolt assembly reciprocatably mounted insaid case,] and an auxiliary bolt member reciprocatably mounted in saidcase, said dead bolt assembly including a rocker mechanism pivotallymounted in said case, said auxiliary bolt member including meansblocking extension of said dead bolt assembly to extended position whensaid auxiliary bolt member is in extended position comprising a slidereciprocatably mounted in said case for movement in a directiontransverse relative to said auxiliary bolt member, a movable connectionbetween said dead bolt assembly and said slide, said auxiliary boltmember having a blocking position relative to said slide when saidauxiliary bolt member is in extended position whereby to block extensionof said dead bolt assembly to extended position and a clear positionrelative to said slide when said auxiliary bolt member is in retractedposition whereby to enable extension of said dead bolt assembly toextended position.

4. In a lock including a case, a dead bolt assembly reciprocatablymounted in said case, [a latch bolt assembly recip rocatably mounted insaid case,] and an auxiliary bolt member reciprocatably mounted in saidcase, said dead bolt assembly including a dead bolt and including arocker pivotally mounted in said case and in operative engagement withsaid dead bolt, said auxiliary bolt member including means blockingextension of said dead bolt when said auxiliary bolt member is inextended position comprising an inwardly extending arm on said auxiliarybolt References Cited The following references, cited by the Examiner,are of record in the patented file of this patent or the originalpatent.

UNITED STATES PATENTS 1,158,845 11/1915 Prinzler 701$1 1,206,896 12/1916Page 7015l 2,821,849 2/1958 Schweitzer 70151 XR 3,242,706 3/ 1966 Check70150 MARVIN A. CHAMPION, Primary Examiner J. R. MOSES, AssistantExaminer US. Cl. X.R.

